Process for producing polycrystalline silicon

a polycrystalline silicon and processing technology, applied in silicon compounds, packaging goods types, transportation and packaging, etc., can solve the problems of not being very practicable, difficult to handle, and increasing the risk of bag damage proportionally with the mass of the chunk, so as to achieve less expensive and economic viability.
US10202282B2Active Publication Date: 2019-02-12WACKER CHEM GMBH
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Patent Information

Authority / Receiving Office
US ยท United States
Patent Type
Patents(United States)
Current Assignee / Owner
WACKER CHEM GMBH
Publication Date
2019-02-12

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Abstract

Polycrystalline silicon chunks are packed for further processing and / or for shipment with minimal contamination by introducing the chunks into a cardboard container lined with a non-contaminating plastic. The process is economical, avoids the problems associated with packaging in plastic bags, and provides far less contamination and spillage during transport.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is the U.S. National Phase of PCT Appln. No. PCT / EP2015 / 054156 filed Feb. 27, 2015, which claims priority to German Application No. 10 2014 203 814.6 filed Mar. 3, 2014, the disclosures of which are incorporated in their entirety by reference herein.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The invention relates to a process for producing polycrystalline silicon.

[0004] 2. Description of the Related Art

[0005] Polycrystalline silicon (polysilicon) is predominantly deposited on thin rods from halosilanes such as trichlorosilane by means of the Siemens process, which gives polycrystalline silicon rods, which are then comminuted into polycrystalline silicon chunks. After the comminution into chunks, it is customary to classify these into particular size classes. After sorting and classification, the chunks are dosed to a particular weight and packed in a plastic bag. A corresponding method for sorting, clas...

Claims

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